Silencer for gaseous currents



19 May 27 A. H. GREEN 51mm FOR GASEOUS cunnmws Filed July 27. 1926Patented May 3, 1927.

UNITED STATES PATENT ()FFICE.

ARCHIBALD HEWLETT GREEN, OF LONDON, ENGLAND, ASSEGNGR TO THE INTER-NATIONAL SILENCEB COMPANY (192(1) LIIVIIlIfiHilI), OI! tilfl'tl'NtlI"?01F TIONDOTSI, ENGLAND,

.A. BRI'IQISH COMPANY,

SILENCER FOR GASEOUS GURRENTS.

Application filed July 27, 1926, Serial No. 1

This inicnlion is an iniprtwcnicnl in or niodil'ication of theii'ivcntion which is the subject of Patent No. hffn hill, relating tonilclu'eir-i l'or gaseous currents, such as are pri'uluced in theexhaust oil internal combustion engines. itluch a. s zilenccr asdi-iscribeijl in the specification oil the said Patent No.

lcomprised a 1' nsversel divisible 1 body or casing ot 'hndrical shapemiddle part and oil reduced dial'neter at its end into wl'iich wastitted a filling coir sisting of a. permeable lion'iogeneous mass ofmetal of a resilient clnjiracter such as very narrov and thin strips oiflexible metal, on closed in a reticulated metal bus: in order E preventthe filling from bein con'ipress d towards the outlet end of theSllGl'lllGl. by the impact s, it w proposed in 'th No. hoiihtii' toprovide an inner casing triiir'neniely divisible into two approximateiyconical shells each having at its base an annular enlarge ment to litinto sockets in the outer casing, each ol' the said shells beingperforated, and the filling being enclosed within the said inner casing..lhis arrangeinent, however, reduced the sluice within the silencer bodyavailable lor containiinz the filling, and it is the object ol thepresent invention to minimine such rcdiuiion while retaining theadvantages of the inner casing.

:xccording to the present ii'ivention a per torated metal cup isinserted into the transversely divisil'ile silencer body, into which itfits at or near the inlet end, against which cup the bag containing thestrip metal or other lilling is packed. A perform'ed. pa -aboloidal,conical, or sin'iilarly shaped shell. or inner casing ot the kinddescribi-id in the specification. of Patent No. 'l.,575,657 is securedwithin the silencer with its apex directed towards the outlet to receivethe other end ol? the filling. The said. shell may be secured inposition by means of a tlange ei'itering between the opposing rims orflanges ol the separate parts of the silencer body in the mannerdescribed in the specification of Patent No. 1,575,657. The bagcan thusbe of greater capacity than that previously used. A large portion of thesurface of the filling bag is thus in contact with the interior of thesilencer body, and the gases enter and traverse the fillinglongitudinally,

25,215, and in Great Britain June 12, 1925.

the silenm-ur casing are indicated at A and B, the part A being; the oneintended to be secured on the exhaust pipe. E indicates a tapered shellor inner casing hat ingits apex pointing toward the outlet and anenlargement e at its base secured within the rim oi the casing B, thisshell E having perlorations at c A. perforated metal cup 1'1 is fittedat the shoulder a of the casii'ig A to overlap the end of the l'illinbag. 'lhe filling ll contained in a reticulatial metal bag K is press'idinto the casing; A so that it against the can ll, after which. the shellE and casing 5 are placed in position and the later secured by the ring;0 fitting over the enlarged. riins a, o of the casing members A and B,which ring; is then tightenec by means of a wing nut at o. The gasespassing through the cup H traverse the filling longitudinall and escapethrough the perforations e and thence through the silencer outlet if.

What I claim and desire to secure by Letters Patent ot' the UnitedStates is 1. In a silencer tor gniseous currents, coinprisin r a bodyportion built of readily detachable sections, said body portion l'iavinga reduced neck at each end, and a filling consisting oi. a permeablehoniogenous tan.- p lcd, nrass o'l. very narrow and thin ribbons offlexible metallic material enclosed in a metal bag made of toraininousreticulated sheet material adapted to lit bodily into the said bodyportion, the con'ibination there with of a rigid perforated inetal cupin serted into the neck at the end of said body at which the uses enter,the convex side of said cup facing the incomin gasesv 2. In a silencerfor gaseous currents, COI11- prising a body portion built oi? readilydetachable sections, said body portion hav ing a reduced neck at eachend, and a filling consisting of a permeable homogenous tangled mass ofvery narrow and thin ribbons of flexible metallic material enclosed in ametal bag made of foraminous reticulated sheet material adapted to fitbodily into the said body ortion, the combination therewith of a rigid.perforated metal cup in serted into the neck at the end of said body atwhich the gases enter, the convex side of said cup facingthe incominggases and an additional perforated metal member located between thefilling and the outlet end of the silencer body.

3. 111 a silencer for gaseous currents comprising a body portion builtof readily detachable sections, said body portion having: a reduced neckat each end, and a filling consisting of a permeable homogenous tangledmass of very narrow and thin ribbons 0t flexible metallic materialenclosed in a metal bag" made of i'oraminous reticulated sheet materialadapted to tit bodily into said body portion, the combination therewithot a rigid perforated metal cup inserted into the end of said body atwhich the gases enter and of a perforated approximately conical shellsecured within the silencer and adjacent the outlet end thereof with iteapex directed towards the outlet.

ARCHIBALD HEWLETT GREEN.

